Nervous System Flashcards
What are the two main divisions of the nervous system?
The central nervous system (CNS) and the peripheral nervous system (PNS)
The CNS includes the brain and spinal cord, while the PNS transmits signals to and from the CNS.
What does the central nervous system (CNS) consist of?
The brain and spinal cord
The CNS is responsible for processing and transmitting information.
What is the role of the peripheral nervous system (PNS)?
Transmits signals between the CNS and the rest of the body
The PNS includes both the somatic and autonomic nervous systems.
What is the function of the somatic nervous system (SNS)?
Transmits information from sensory receptors to the CNS and from the CNS to skeletal muscles
It is responsible for voluntary actions.
What activities does the autonomic nervous system (ANS) regulate?
Involuntary activities of smooth muscles and organs
Some activities can be brought under voluntary control through techniques like biofeedback.
What are the two divisions of the autonomic nervous system (ANS)?
The sympathetic nervous system and the parasympathetic nervous system
These systems have opposing effects on the body.
What is the primary function of the sympathetic nervous system?
Prepares the body for action
It is activated during the fight-or-flight response.
What physiological changes occur due to the sympathetic nervous system during an emergency?
Pupil dilation, sweating, increased heart and respiration rates, inhibition of digestion and sexual activity
These changes prepare the body for immediate action.
What is the role of the parasympathetic nervous system?
Governs rest and relaxation
It helps the body return to its pre-emergency state after a fight-or-flight response.
True or False: The sympathetic and parasympathetic nervous systems are never active at the same time.
False
Both systems are active to some degree and cooperate for certain functions.
Fill in the blank: The parasympathetic nervous system is necessary for _______.
erection
This is part of its role in regulating sexual functions.
Fill in the blank: The sympathetic nervous system is responsible for _______.
ejaculation
This highlights the cooperative role of both nervous systems in male sexual response.
